Die



Patented July 1, 1941 T al; ICE

DIE

Carl F. Lindholm, St. Louis, Mo., assignor to Independent Die and Supply Company, St. Louis, Mo., a corporation of Missouri Application November 30, 1940, Serial No. 367,893

4 Claims.

This invention pertains to cutting dies, and, more particularly, to the type of blanking dies used in the manufacture of leather goods, such as gloves, and in many other industries, Such a die is usually provided with a stripper, and the present invention is particularly concerned with means for adjusting the stripper and for maintaining such an adjustment.

One of the objects of this invention is to provide means for accurately positioning a stripper with respect to the die.

Another object is to provide such means capable of adjustment from time to time to correct inaccuracies due to wear of the apparatus.

Further objects will appear from the following description, taken in connection with the accompanying drawing, in which:

Figure 1 is a perspective View showing a die of the type to which this invention is applied;

Figure 2 is a longitudinal vertical section of a die, such as shown in Figure l, embodying this invention; and

Figure 3 is a large perspective View of the means for fastening and adjusting the die retainer.

Referring to the drawing, the die comprises a blade I having a cutting edge 2. The blade I is mounted on a base plate 3 and may be provided with means, such as the rib or bead 4, for protecting the operators hands from the operating press, or the like.

Within the contour of the blade I a stripper 5 is mounted. This stripper is pressed outwardly from the base 3 by a coil spring 6, engaging centering bosses 1 and 8 on the base 3 and the stripper 5, respectively.

The outward movement of the stripper 5 is limited by flexible retainers 9. In the embodiment illustrated each retaineris made in the form oi a chain suitably anchored to an ear IIJ on the stripper In order to anchor the lower end of the chain 9, a hollow stud II is secured to the base plate 3 in any suitable manner, as by riveting. This stud is slotted, as indicated at I2. A flat nut I3 is threaded on the stud II and perforated at diametrically opposite points, as indicated at I4, to receive an anchoring or locking element I 5, shown in the drawing as a cotter pin.

It is important that the stripper 5 be adjusted accurately ush with the cutting edge. In order to do this, the nut I3 and the pin I5 may be adjusted on the threads of the stud II, so as to raise or lower it with reference to the cutting edge 2, When fa proper adjustment has been obtained, the lower link of the element 9 is passed into the hollow stud II and the locking pin I5 is then passed through the perforations I4 in the nut I3, and the slots I2 in the stud II and through the opening in the lower link of the element 9. When the pin I5 has been inserted in this manner, its outer ends may be spread, as shown in Figure 3, and the retainer 9 will then be anchored in its adjusted position.

It will be seen that this invention provides simple and accurate means for adjusting the stripper retainers, so that the stripper may be accurately located. While the retainers 9 are shown in the drawing as chains, any other suitable flexible retaining element may be employed. It is necessary only to provide a perforation at it lower end to receive the pin I 5, It will be noted that this provides a very iine and gradual adjustment, since the threads of the stud II may be as ne as desired. In the arrangement shown, an adjustment is obtained as small as half the pitch of the thread. A iiner adjustment may be obtained, if desired, by increasing the number of slots I2 in the stud. This adjustment is very simple and is quickly and easily carried out without special tools.

It is obvious that various changes may be made in the details of construction within the scope of the appended claims without departing from the spirit of this invention, and that the invention is not limited to the specific details shown and described.

The invention having thus been described, what is claimed is:

1. A die having a cutting edge and provided with a stripper, means for moving said stripper into stripping position, a ilexible retainer for Said stripper, a screw-threaded, slotted anchorage stud, a nut secured to said retainer and adjustable on said stud to anchor said retainer, and means engageable with the slot in said stud to lock said nut.

2. A die having a cutting edge and provided with a stripper, means for moving said stripper into stripping position, a flexible retainer for said stripper, a screw-threaded, slotted anchorage stud, a perforated nut adjustable on said stud, and a locking element engageable simultaneously with the perforation of said nut and the slot in said stud and secured to said retainer to anchor the same.

3. A die having a cutting edge and provided with a stripper, means for moving said stripper into stripping position, a chain providing a retainer :for said stripper, a screw-threaded, slotted anchorage stud, a perforated nut adjustable on said stud, and a locking pin engageable simultaneously with the yperforation of said nut, the slot in said stud and a link of said chain to secure said chain to said nut and lock said nut against adjustment.

4. A die having a cutting edge and provided with a stripper, means for moving said stripper into stripping position, a flexible retainer for said stripper, a screw-threaded anchorage stud having a recess, anchorage means adjustable on the thread of said stud, and means to secure said retainer to said anchorage means and to engage said recess to lock said anchorage means in adjusted position.

CARL LINDHOLM. 

